an alloy (usually of lead and tin) used when melted to join two metal surfaces
source: WordNet 3.0
A metal or metallic alloy used when melted for uniting adjacent metallic edges or surfaces; a metallic cement.
source: Webster 1913
verb
join or fuse with solder
Solder these two pipes together.
source: WordNet 3.0
To unite (metallic surfaces or edges) by the intervention of a more fusible metal or metallic alloy applied when melted; to join by means of metallic cement.
